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公开(公告)号：US11921952B1
公开(公告)日：2024-03-05
申请号：US17902915
申请日：2022-09-05
Applicant: NOVATEK Microelectronics Corp.
Inventor： Tsen-Wei Chang
CPC classification number: G06F3/04184 , G06F3/0412 , G06F3/04164 , G06F3/044 , H03G3/30
Abstract: A signal processing circuit includes a driving signal generator and an encoder. The driving signal generator is configured to generate a driving signal. The encoder includes a multiplexer, a plurality of driver/receiver circuits and a summation circuit. The multiplexer is configured to receive multiple sensing signals in response to the driving signal. Among the driver/receiver circuits, a first driver/receiver circuit is configured to receive at least one first sensing signal, and apply a first gain to the first sensing signal to generate a first encoded signal; and a second driver/receiver circuit is configured to receive at least one second sensing signal other than the first sensing signal, and apply a second gain different from the first gain to the second sensing signal to generate a second encoded signal. The summation circuit is configured to sum up the first encoded signal and the second encoded signal to generate an encoded data.
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公开(公告)号：US20230079469A1
公开(公告)日：2023-03-16
申请号：US17474081
申请日：2021-09-14
Applicant: NOVATEK Microelectronics Corp.
Inventor： Tsen-Wei Chang , Wing-Kai Tang , Shih-Chi Lin
IPC: G06F3/041
Abstract: A method for driving a touch panel includes applying a touch driving signal to the touch panel for touch sensing, wherein an amplitude of the touch driving signal rises and falls gradually.
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Patent Agency Ranking
公开(公告)号：US20220406085A1
公开(公告)日：2022-12-22
申请号：US17891149
申请日：2022-08-19
Applicant: Novatek Microelectronics Corp.
Inventor： Wei-Lun Shih , Tsen-Wei Chang , Cho-Hsuan Jhang , Chih-Peng Hsia , Cheng-Yu Chiang
IPC: G06V40/13
Abstract: A driving apparatus and an operation method thereof are provided. The driving apparatus includes a first driving circuit and a second driving circuit. The first driving circuit suspends performing at least one of a display driving operation and a touch sensing operation during a skip period under a driving mode, and the first driving circuit performs the at least one of the display driving operation and the touch sensing operation outside the skip period under the driving mode. The second driving circuit is coupled to the first driving circuit. The second driving circuit performs a fingerprint sensing operation during the skip period.
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24.发明授权公开(公告)号：US11295108B2
公开(公告)日：2022-04-05
申请号：US16907176
申请日：2020-06-20
Applicant: NOVATEK Microelectronics Corp.
Inventor： Tsen-Wei Chang , Chih-Peng Hsia , Wei-Lun Shih , Hong-Chu Chen , Su-Wei Lien , Sheng-Wen Hsiao , Liang-Chi Cheng
Abstract: A control method for an optical fingerprint sensor is provided for canceling or reducing capacitive loading. The optical fingerprint sensor includes a plurality of pixels, and each of the pixels has a first control signal line and a second control signal line. Each of the pixels is further coupled to a first voltage source line, a second voltage source line and a sensing line. The control method includes a plurality of steps, and the steps are applying a first anti-loading driving (ALD) signal on the second control signal line, and applying a second ALD signal on at least one of the first control signal line, the first voltage source line, the second voltage source line and the sensing line.
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公开(公告)号：US10977470B1
公开(公告)日：2021-04-13
申请号：US16698914
申请日：2019-11-27
Applicant: Novatek Microelectronics Corp.
Inventor： Tsen-Wei Chang
Abstract: A touch-panel control apparatus and an operation method thereof are provided. The touch-panel control apparatus includes a fingerprint sensing circuit, a touch detection circuit, and an application processor. The fingerprint sensing circuit is coupled to a touch panel to sense a fingerprint of an object. The touch detection circuit is coupled to the touch panel to detect a touch behavior of the object on the touch panel. The application processor is coupled to the fingerprint sensing circuit and the touch detection circuit. The application processor is configured to enter an encryption mode to sense the fingerprint via the fingerprint sensing circuit. The application processor detects the touch behavior via the touch detection circuit in the encryption mode. When the touch behavior changes in the encryption mode, the application processor ends the encryption mode early.
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公开(公告)号：US20210081640A1
公开(公告)日：2021-03-18
申请号：US17107962
申请日：2020-12-01
Applicant: NOVATEK Microelectronics Corp.
Inventor： Tsen-Wei Chang , Chih-Peng Hsia , Wei-Lun Shih , Hong-Chu Chen , Su-Wei Lien , Sheng-Wen Hsiao , Liang-Chi Cheng
Abstract: The present invention provides a control method for an optical fingerprint sensor and a touch controller. The optical fingerprint sensor includes a plurality of pixels, and each of the pixels has a first control signal line and a second control signal line. Each of the pixels is further coupled to a first voltage source line, a second voltage source line and a sensing line. The control method includes the step of applying an anti-loading driving (ALD) signal on at least one of the first control signal line, the second control signal line, the first voltage source line, the second voltage source line and the sensing line when the touch controller is in a touch operation period.
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27.发明申请CARRIER SIGNAL DETECTION APPARATUS, TOUCH CONTROL DETECTION APPARATUS AND DETECTION METHODS THEREOF 有权载波信号检测装置，触控控制检测装置及其检测方法公开(公告)号：US20150130744A1
公开(公告)日：2015-05-14
申请号：US14141452
申请日：2013-12-27
Applicant: Novatek Microelectronics Corp.
Inventor： Hung-Cheng Kuo , Tsen-Wei Chang
CPC classification number: G06F3/044 , G06F3/0416 , G09G5/18
Abstract: A carrier signal detection apparatus, a touch control apparatus and detection methods thereof are provided. The carrier signal detection apparatus includes an analog to digital converting (ADC) apparatus and a filter. The ADC apparatus receives an analog input signal and converts the analog input signal to a digital signal. The filter receives the digital signal and accumulates the digital signal according to a delay time for generating a carrier signal detection result.
Abstract translation: 提供载波信号检测装置，触摸控制装置及其检测方法。 载波信号检测装置包括模数转换（ADC）装置和滤波器。 ADC装置接收模拟输入信号并将模拟输入信号转换为数字信号。 滤波器接收数字信号并根据用于产生载波信号检测结果的延迟时间累加数字信号。
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